Article
Chemistry, Physical
Toshiaki Fukagawa, Yasuyuki Saito, Akihiro Matsuyama
Summary: The study found that with an increase in x value, the secondary phase of HEAs increased, resulting in lower hydrogen storage capacity and unstable hydrides. After alkaline treatment, the HEA alloy surface changed, leading to increased discharge capacity, enhanced high-rate dischargeability, and cycle performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Quan Li, Zhuoya Peng, Wenbin Jiang, Liuzhang Ouyang, Hui Wang, Jiangwen Liu, Min Zhu
Summary: A series of Ti-Zr-Cr-Fe alloys have been designed for a metal hydride hydrogen compressor through orthogonal experiments. The effects of substitution and over-stoichiometry on hydrogen storage properties were investigated, with the (Ti0.85Zr0.15)(1.05)Cr1.1Fe0.9 alloy selected for its maximum storage capacity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
ChuBin Wan, R. V. Denys, V. A. Yartys
Summary: The study investigated the structural composition and electrochemical capacity of four AB(2) Laves-type intermetallic alloys with different Ti/Zr ratios, revealing the gradual shrinkage of the unit cells of the C15 phase with increased Ti substitution for Zr. All studied alloys showed similar activation behaviors, requiring four cycles to achieve the highest electrochemical capacity of the anodes.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Electrochemistry
Jude A. Osara, Michael D. Bryant
Summary: This study demonstrates a thermodynamics-based characterization of electrochemical power sources and introduces new performance/degradation factors. Results from various power source types are consistent, validating anticipated system behaviors and introducing a normalized DEG domain for comparative analysis.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Physical
He Wang, AnChun Tang, ChuBin Wan, WenXuan Yin, YuTing Wang, Xin Ju
Summary: The structure of Ce-doped Ti0.24Zr0.76Ni1.15Mn0.7V0.15 alloy was studied, and it was found that Ce formed a CeNi3 secondary phase instead of entering the Laves phases. The synergistic effect of CeNi3 and (Ti,Zr)Ni improved the hydrogen storage properties and electrochemical performances of the alloy. The Ce-doped AB2 alloy showed a higher hydrogen storage capacity, good cyclic stability, and faster activation rate.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Wenhao Lin, Helge Heinrich, Ji Ma
Summary: An unusual structural distortion was observed in metastable beta Ti-Nb after laser melting, where a difference in crystal structure was found between the cellular solidification interior and intercellular regions.
SCRIPTA MATERIALIA
(2022)
Article
Chemistry, Physical
HongXin Li, ChuBin Wan, XiangCao Li, Xin Ju
Summary: The LaMgNi4 alloy shows promising potential as an active material for the negative electrode in Ni/MH batteries, exhibiting high hydrogen storage capacity and good cycling stability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Multidisciplinary Sciences
Aydin Bordbar-Khiabani, Michael Gasik
Summary: The presence of hydrogen peroxide affects the corrosion resistance of titanium biomaterials, while the synergistic action of hydrogen peroxide, albumin, and lactate under severe inflammatory conditions decreases the corrosion resistance. The TNZS alloy, with the addition of silicide phases, demonstrates superior corrosion resistance in all conditions and favorable biocompatibility in cell culture investigations, suggesting its potential as a competitive biomaterial for orthopedic applications.
SCIENTIFIC REPORTS
(2023)
Article
Nanoscience & Nanotechnology
Jay Singh, Priyanka Yadav, Rajamani Nagarajan, Jaekook Kim, Alok Kumar Rai
Summary: In this work, titanium (Ti4+) doping was optimized in CoMoO4 nanorod anode material to improve its intrinsic behavior for lithium-ion battery applications. Among the different doping concentrations, 20 wt % Ti-doping showed the best performance in terms of reversible capacity, cycling stability, and rate capability. Ti4+ doping introduced additional electrons and vacancies in the CoMoO4 crystal lattice, leading to enhanced electronic conductivity and diffusion rate of Li+ ions. The 20 wt % Ti-doped CoMoO4 anode exhibited superior electrochemical performance due to the optimum doping concentration and synergistic effect of TiO2 nanoparticles.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
Shuanglei Li, Yeon-wook Kim, Mi-seon Choi, Tae-hyun Nam
Summary: Highly porous Ti-40Zr-8Nb-2Sn shape memory alloy scaffolds were prepared by fiber metallurgy, showing mechanical properties similar to cancellous bone and stable cyclic superelastic behavior. The scaffolds exhibited a three-dimensional network structure with fiber-fiber bonds and had a porosity of about 80% and pore size larger than 100 μm.
Article
Engineering, Environmental
Hongwei Bi, Shengli Zhu, Yanqin Liang, Hui Jiang, Zhaoyang Li, Shuilin Wu, Hao Wei, Chuntao Chang, Zhenduo Cui
Summary: Multivalent ion batteries hold promise for future energy storage. This study demonstrates the enhanced electrochemical performance of 2D cation-deficient TiO2(B) nanosheets through the substitution of oxygen with fluorine. The resulting D-TiO2(B) exhibits improved charge transfer, diffusion coefficient, and electrochemical kinetics, leading to high reversible capacity, long-cycling stability, and rate capability in both Mg-ion and Li-ion batteries.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Ziming Cao, Mingyuan Piao, Xuezhang Xiao, Liujun Zhan, Panpan Zhou, Zhinian Li, Shumao Wang, Lijun Jiang, Fen Xu, Lixian Sun, Lixin Chen
Summary: In this study, three series of alloys were prepared and their crystal structural characteristics and hydrogen storage properties were investigated. The results showed that a single C14-Laves phase with homogeneous element distribution existed in all alloys. The hydrogen absorption/desorption plateau of the alloys increased as the Fe, Mn, or Ti content increased. The hydrogen storage capacity of the alloys also correlated negatively with the hydrogen affinity of interstitial sites. Ti0.935Zr0.085Cr1.3Mn0.3Fe0.4 alloy exhibited saturated hydrogenation under 8 MPa at 293 K and dehydrogenation around 24.91 MPa pressure at 363 K with a hydrogen capacity of 1.74 wt%, as well as excellent cycling performance and mere hysteresis. Ti0.92Zr0.10Cr1.0Mn0.6Fe0.4 alloy showed promising hydrogen capacity of 1.86 wt% at 283 K and a dehydrogenation pressure of 27.94 MPa at 363 K, along with satisfactory cycling durability. This study can guide the compositional design of AB2-type hydrogen storage alloys for hydrogen compression application.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Panpan Zhou, Ziming Cao, Xuezhang Xiao, Liujun Zhan, Shouquan Li, Zhinian Li, Lijun Jiang, Lixin Chen
Summary: Two series of Ti-based alloys were developed for high-density hydrogen storage units by partially substituting Zr for Ti and Cr for Mn, with systematic investigation on their microstructures and hydrogen storage performances. The study found that the hydrogen storage capacity and plateau pressures of the alloys varied with different alloy compositions, and Ti0.95Zr0.05Mn0.9Cr0.9V0.2 alloy exhibited the best hydrogen storage performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Ziyu Lu, Zhixin Tai, Zhipeng Yu, Alec P. LaGrow, Oleksandr Bondarchuk, Juliana P. S. Sousa, Lijian Meng, Zhijian Peng, Lifeng Liu
Summary: The study introduces a new three-dimensional composite anode structure for lithium metal that successfully addresses challenges such as dendrite growth and volume change in rechargeable Li batteries. The anode shows improved stability and cycling performance in a carbonate electrolyte, with no dendrite growth observed, and demonstrates better rate capability and cycle performance when assembled in a full cell paired with a LiFePO4 cathode.
MATERIALS TODAY ENERGY
(2021)
Article
Materials Science, Multidisciplinary
Dongyeon Kim, Dahyeon Woo, Youho Lee
Summary: Hydride reorientation experiments were conducted on unirradiated Zr-Nb alloy cladding tubes under multi-axial stress states induced by internal pressurization. The behaviors of radial hydride fraction were investigated for various rod internal pressures and hydrogen contents, and empirical models were developed. Compression tests were performed to study the change in toughness with radial hydride formation. The results showed the significance of considering rod internal pressure in explaining the critical conditions for hydride reorientation.
JOURNAL OF NUCLEAR MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Volodymyr A. Yartys, Vasyl V. Berezovets, Ponniah Vajeeston, Lev G. Akselrud, Vladimir Antonov, Vladimir Fedotov, Steffen Klenner, Rainer Poettgen, Dmitry Chernyshov, Michael Heere, Anatoliy Senyshyn, Roman V. Denys, Ladislav Havela
Summary: Understanding the relationship between the structure, composition, and hydrogenation properties of intermetallic hydrides is crucial for improving their hydrogen storage performance. The ability to form hydrides and control their interaction with hydrogen is determined by their chemical composition. This study investigated a ScNiSn-based intermetallic hydride using various experimental techniques, including synchrotron and neutron powder diffraction, Mössbauer spectroscopy, hydrogenation, and thermal desorption spectroscopy. Computational calculations were also performed. The study revealed the mechanism of phase-structural transformation and the formation of unique metal-hydrogen bonding in the intermetallic alloy. At high pressures, a TiNiSi-type hydride was formed. The study also showed that scandium behaves similarly to the heavy rare earth metal holmium.
Article
Materials Science, Multidisciplinary
Jhuo-Lun Lee, Pei-Te Wang, Kai-Chi Lo, Pai-Keng Shen, Nien-Ti Tsou, Koji Kakehi, Hideyuki Murakami, Che-Wei Tsai, Stephane Gorsse, An-Chou Yeh
Summary: In this study, the tensile and creep deformation behavior of a high-entropy alloy fabricated by selective laser melting (SLM) was investigated. The issue of hot ductility drop was successfully resolved by modifying the grain boundary morphology to a serrated structure. Tensile and creep tests showed that the serrated grain boundary significantly enhanced the fracture strain and creep rupture life by a factor of 3.5 and 400, respectively. Molecular dynamic simulation further demonstrated that the serrated grain boundaries could distribute strains more evenly and provide resistance against intergranular cracking.
SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS
(2023)
Article
Polymer Science
Amaliya Rasyida, Salma Halimah, Ika Dewi Wijayanti, Sigit Tri Wicaksono, Haniffudin Nurdiansah, Yohannes Marudut Tua Silaen, Yatim Lailun Ni'mah, Hosta Ardhyananta, Agung Purniawan
Summary: This study investigated the interrelation between the addition of reduced graphene oxide (r-GO) into PVA/Alginate and their degradation and biocompatibility properties. The morphology of the composites was characterized using scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS), and the mechanical properties were determined through a compressive test. In vitro cytotoxicity and cell viability were assessed using an MTT assay. The presence of r-GO was found to have no significant effect on the morphology of the hydrogel, and the addition of 0.4% r-GO increased cell viability, indicating low toxicity. The studied composites showed minimal degradation and outstanding biocompatibility, making them attractive materials for tissue engineering applications.
Article
Chemistry, Physical
Moreau Louis Etienne, Gorsse Stephane, Lambard Guillaume, Murakami Hideyuki
Summary: This study investigates the microstructure evolution and oxidation resistance of Co-Cr-Ta ternary alloys, which exhibited good oxidation resistance and formed a continuous CrTaO4 layer. Additionally, the use of a data-driven strategy for optimization of the Co-Cr-Ta composition demonstrated potential for alloy design in the future.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Biochemistry & Molecular Biology
Emil H. Jensen, Loris Lombardo, Alessandro Girella, Matylda N. Guzik, Andreas Zuttel, Chiara Milanese, Pamela Whitfield, Dag Noreus, Sabrina Sartori
Summary: Metal hydrides are chemical compounds that can store hydrogen in a reversible, compact, and safe manner. A(2)B(7)-type intermetallic alloys based on La-Mg-Ni have high electrochemical hydrogen storage capacity and extended cycle life. This study investigates the relationship between material structural properties and hydrogen sorption performances for La2-xYxNi6.50Mn0.33Al0.17 compounds. The results show that higher Y content helps maintain material crystallinity and increases its hydrogen storage capacity.
Article
Multidisciplinary Sciences
Sriswaroop Dasari, Abhishek Sharma, Chao Jiang, Bharat Gwalani, Wei-Chih Lin, Kai-Chi Lo, Stephane Gorsse, An-Chou Yeh, Srivilliputhur G. Srinivasan, Rajarshi Banerjee
Summary: Understanding and tailoring the local chemical ordering in random solid solutions is crucial for designing complex multicomponent alloys. A simple thermodynamic framework based on binary enthalpies of mixing is used to select optimal alloying elements to control chemical ordering in high-entropy alloys (HEAs). By combining multiple characterization techniques, it is demonstrated that controlled additions of certain elements can drive chemical ordering and significantly enhance the mechanical properties of the alloys.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Nanoscience & Nanotechnology
Advika Chesetti, Sucharita Banerjee, Sriswaroop Dasari, Mohan Sai Kiran Nartu, S. M. Varahabhatla, Abhishek Sharma, Abhishek Ramakrishnan, Daniel Satko, Stephane Gorsse, Ayman Salem, Rajarshi Banerjee
Summary: A low-density precipitation strengthened CCA, Al10Nb15Ta5Ti30Zr40, with excellent room temperature mechanical properties and high plasticity, has been successfully developed through 3D printing.
SCRIPTA MATERIALIA
(2023)
Article
Multidisciplinary Sciences
Wei Chen, Antoine Hilhorst, Georgios Bokas, Stephane Gorsse, Pascal J. Jacques, Geoffroy Hautier
Summary: Based on high-throughput density-functional theory calculations, a chemical map of single-phase equimolar high-entropy alloys is constructed, and 30,201 potential alloys are identified. The formation of these alloys is mainly driven by the complex interplay among mixing enthalpy, intermetallics formation, and melting point. Two new high-entropy alloys, AlCoMnNiV and CoFeMnNiZn, are successfully synthesized based on the predictions.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Maria Moussa, Stephane Gorsse, Jacques Huot, Jean Louis Bobet
Summary: In this study, the effects of Ti replacement by Hf and the synthesis method on microstructure and crystal structure evolution in HfxTi(1-x)NbVZr high-entropy alloy were investigated. Experimental observations and theoretical thermodynamic calculations were compared, showing good agreement for arc-melted alloys but poorer agreement for induction-melted alloys. The difference was attributed to the estimation of cooling rate and the lack of a thermodynamic database.
Editorial Material
Nanoscience & Nanotechnology
An-Chou Yeh, Stephane Gorsse, Veerle Keppens, Dustin A. Gilbert
Article
Chemistry, Physical
Tso-Wei Chen, Pei-Te Wang, Yung-Chang Kang, Bo-Cheng Wu, Nien-Ti Tsou, Uwe Glatzel, Stephane Gorsse, An-Chou Yeh
Summary: This study aims to explain the underlying mechanism of grain boundary serration and its effect on the hot workability of U720Li superalloy. It was found that different cooling rates during heat treatments resulted in different types of grain boundary serrations. The presence of Type-II boundary improved the hot formability of U720Li, allowing for a high reduction ratio without crack formation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Editorial Material
Chemistry, Physical
Volodymyr A. Yartys, Fermin Cuevas
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Volodymyr A. Yartys, Colin J. Webb, Fermin Cuevas
Summary: The paper provides an overview of advanced in situ diffraction studies for probing the structure and reacting mechanisms of hydrogen and energy storage materials. These studies utilize high flux diffraction beam and high resolution measurements to establish the mechanism of phase-structural transformations and their kinetics. Various conditions, such as hydrogen/deuterium pressures and temperatures, as well as different charge-discharge states, are considered. The paper also highlights the contributions of Dr. Michel Latroche and summarises a long-standing collaboration between the co-authors in the field.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Physics, Applied
Sriswaroop Dasari, Abhishek Sharma, Stephane Gorsse, Advika Chesetti, Rajarshi Banerjee
Summary: The complex competition between different phase stabilities in the Al0.25CoFeNi high entropy alloy leads to non-classical phase transformation pathways and novel microstructures. At 500°C, the competition between homogeneous precipitation of L1(2) and heterogeneous precipitation of BCC/B2 phases can be studied. Isothermal annealing of the alloy at this temperature results in the formation of a transient ordered L1(2) phase followed by the eventual formation of a near equilibrium L1(2) phase. However, the true equilibrium for the alloy at 500°C is a mixture of L1(2) + B2 phases, with the B2 phase growing sluggishly from grain boundaries.
JOURNAL OF APPLIED PHYSICS
(2023)
Review
Energy & Fuels
Thabang R. Somo, Mykhaylo V. Lototskyy, Volodymyr A. Yartys, Moegamat Wafeeq Davids, Serge Nyallang Nyamsi
Summary: High entropy alloys (HEAs) formed by multi-principal elements show promising hydrogen storage performance. The properties of HEAs are related to their chemical composition and constituent elements, including electronegativity, atomic radii, and valence electron concentration. This review aims to clarify these features by performing systematic analysis of available experimental data. The analysis shows that valence electron concentration plays the most significant role in tuning the hydrogen storage performance of HEAs.
JOURNAL OF ENERGY STORAGE
(2023)
